Originally posted by MamaJ
reply to post by PuterMan
Also, they seem to postulate that with the uptick in volcanic activity will bring about an uptick in earthquakes.
Letters to Nature
Nature 203, 508 - 509 (01 August 1964); doi:10.1038/203508b0
Magnetic Disturbances preceding the 1964 Alaska Earthquake
GEORGE W. MOORE
U.S. Geological Survey, Menlo Park, California.
THROUGH a fortunate circumstance, a recording magnetometer was operating in the city of Kodiak, 30 km north-west of the surface trace of a fault zone along which movement occurred at the time when the earthquake occurred in Alaska on March 27, 1964. Fortunately, too, the instrument was on such high ground that it was not reached by the subsequent seismic sea wave which virtually destroyed the city. The magnetometer recorded the fact that the largest of several magnetic disturbances briefly increased the intensity of the Earth's magnetic field by 100γ at Kodiak, 1 h 6 min before the earthquake (Fig. 1).
Alexander, H. , Kodiak Electric Assoc. (personal communication, 1964).
Ashby, W. O. , Fairchild Aerial Surveys (personal communication, 1964).
Stacey, F. D. , Nature, 200, 1083 (1963). | ISI |
Breiner, S. , Nature, 202, 790 (1964). | Article | ISI |
See also Grantz, A. , Plafker, G. , and Kachadoorian, R. , Alaska's Good Friday Earthquake, March 27, 1964; a Preliminary Geologic Evaluation (U.S. Geol. Survey, Circ. 491, Washington, 1964).
A panel of experts under Japan's nuclear regulatory authority reaffirmed Monday that a geologic fault running directly underneath a reactor in western Japan is likely to be active.
The fault, known as D-1 and existing below the No. 2 reactor of Japan Atomic Power Co.'s Tsuruga plant in Fukui Prefecture, is feared to possibly affect key facilities located above, the experts say in a draft report summarizing their discussions.
The report is to be submitted to the Nuclear Regulation Authority after the contents are finalized so the NRA can decide its stance on the plant's resumption.
It is unclear, though, when the report will be submitted to a meeting of five NRA members, because Kunihiko Shimazaki, the panel head and an NRA member, says he wants other outside experts to check the report "to improve" the contents.
An official of the NRA secretariat told reporters later that details of the so-called "peer review" have yet to be decided and the timing of when the report will be finalized may depend on how the process will be implemented.
"We're not expecting to spend much time, but I can't tell at this moment by when (the review will finish)," the official said.
A conclusion that the plant's No. 2 reactor is sitting above an active fault may force Japan Atomic Power to scrap the unit.
The plant operator acknowledged in 2008 that a major active fault called Urazoko is located only about 250 meters from both the No. 1 and No. 2 reactor buildings, but it has denied that the two reactors sit above faults that could move in the future.
The report, however, said the D-1 fault could move in conjunction with the Urazoko fault.
As for the activity of other faults that run beneath the plant's No. 1 reactor, the draft report says the outcome of the investigation conducted by Japan Atomic Power should be waited for before assessments are made.
Most of Japan's reactors are currently offline, including Japan Atomic Power's reactors, amid safety concerns over the use of nuclear power in the wake of the 2011 Fukushima Daiichi complex disaster.
Plant operators in quake-prone Japan are not allowed to build reactors or related facilities important for safe reactor operation directly above active faults.
Copyright 2013 Kyodo News
Japan's Nuclear Regulation Authority decided Tuesday to stipulate more clearly as a safety requirement that reactors must not be built directly above geologic faults that could move in the future.
The current guidelines, crafted before the 2011 Fukushima Daiichi complex disaster, employ indirect wording to rule out the placing of important facilities above active faults, saying regulators do "not expect" such a situation.
The NRA is in the process of compiling new safety standards, set to come into force in July, which will replace the current guidelines that proved insufficient in the wake of the Fukushima disaster, triggered by the March 2011 earthquake and tsunami in northeastern Japan.
The new regulatory requirements are drawing attention because they could affect the reactivation of the country's reactors. Only two reactors in Japan are currently operating amid safety concerns over the use of nuclear power.
On Tuesday, a panel of experts appointed by the NRA drew up the outline of the safety measures to address the risk posed by earthquakes and tsunami. A separate panel is crafting measures to address severe accidents.
As for the location of important facilities, utilities should not only take heed of active faults but faults that could cause deformation of the ground surface as well as earthquake-triggered landslide displacement.
The new safety standards will also call on utilities to assess the activity of faults under a plant's premises as far back as around 400,000 years ago if they cannot rule out that the faults have moved in the last 120,000-130,000 years -- the current benchmark for deciding whether faults are active.
To address the risk of tsunami, utilities will be asked to come up with estimates of the largest tsunami that could hit nuclear plants, reflecting the latest scientific knowledge, and to ensure important facilities are designed to withstand them, according to the outline of the new safety standards.
Copyright 2013 Kyodo News
Idemitsu Kosan Co. and AltaGas Ltd. of Canada said Tuesday they will form a joint venture to develop liquefied natural gas in Canada for export to Japan and other Asian countries.
AltaGas Idemitsu Joint Venture Limited Partnership will be established in February with plans to build facilities to liquefy natural gas on the Pacific coast of Canada.
The two companies are aiming to produce 2 million tons of LNG per year and begin exports of LNG as early as 2017.
It is the first time for Idemitsu Kosan to embark on an LNG project.
LNG demand has surged in Japan since the March 2011 earthquake and tsunami in the northeast that triggered a nuclear crisis at the Fukushima Daiichi power plant.
Copyright 2013 Kyodo News
thus I am thinking that around 1980 and 1990 more instruments were added to the system giving a wider coverage for smaller quakes.
Originally posted by PuterMan
update to post by PuterMan
No change to the mining blasts list as yet. Has not been updated.
That earthquake has not appeared in the lists either. I will give them 48 hours and then will start asking questions if nothing has appear in either place.